Professor Lasch authored an amicus brief in the Massachustts case for law professors. The Padilla retroactivity issue remains pending in several other state supreme courts, including New Mexico, New York, Connecticut, Maryland, and Tennessee.

UPDATE (September 18): The New Mexico Supreme Court granted leave for a four New Mexico legal academics and the National Immigration Project of the National Lawyers Guild to file an amicus brief in Ramirez v. State, in which the New Mexico Supreme Court must decide the question recently decided in Commonwealth of Massachusetts v. Sylvain: Whether Padilla v. Kentucky applies retroactively as a matter of state law, despite the U.S. Supreme Court's holding in Chaidez v. United States that Padilla does not apply retroactively as a matter of federal law.
The New Mexico amicus brief can be accessed here.